Malfunction Of Thread Break Detection - Happy HCS-1201-30 Maintenance Manual

Trouble shooting(Malfunction of thread break detection)
Trouble Factor
Malfunction
of Mechanical
thread break
detection
(not detected) Operator
(slow detected)
Cause of trouble and measure
1. Check circuit board.
1-1 Replace of CPU board.
1-2 Replace of TC 12 board.
1. Is thread tension proper?
1-1 Observing sewing rhythm, adjust to proper thread tension.
(Adjust it little bits stronger.)
2. Is proper detecting sensitivity of thread cut selected?
2-1 In case of being not detected, make [thread cut detection] setting to [yes].
2-2
Select detection sensitivity of thread cut according to sewing condition of thread and cloth etc.
192/204
( ) ----- Reference instruction book
7-2-7
Page
(4-5) (8-1)
(11-3)